1. Affolter, H., Rossetti, M.: Zur Funktion des gastro-oesophagealen Sphincters nach Fundo-plicatio. Schweiz. med. Wschr. 100, 1230 1231(1964).
2. Castell, D.O., Harris, L.D.: Hormonal control of gastro-oesophageal sphincter strength. New Engl. J. Med. 282, 886–889 (1970).
3. Christensen, J.: Neural control mechanisms in the esophagus. A cryptic motor innervation. In: Proc. Fourth Internat. Symposium on Gastrointestinal Motility, p.607–611. Vancouver: Mitchell Press 1974.
4. Christensen, J., Conklin, J.: Studies on the origin of the distinctive mechanics of smooth muscle at the esophagogastric junction. In: Proc. Fourth Internat. Symposium on Gastrointestinal Motility, p.63–71. Vancouver: Mitchell Press 1974.
5. Christensen, J., Freeman, B.W., Miller, J.K.: Some physiological characteristics of the esophagogastric junction in the opossum. Gastroenterology 64, 1119–1125 (1973).